diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8a419d0b44..49b071c3b7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## [2.188.0](https://github.com/googleapis/google-api-python-client/compare/v2.187.0...v2.188.0) (2026-01-06)
+
+
+### Features
+
+* Auto-enable mTLS when supported certificates are detected ([#2686](https://github.com/googleapis/google-api-python-client/issues/2686)) ([a1fd6f3](https://github.com/googleapis/google-api-python-client/commit/a1fd6f358f475a17612fe374502666581d571a8c))
+
 ## [2.187.0](https://github.com/googleapis/google-api-python-client/compare/v2.186.0...v2.187.0) (2025-11-04)
 
 
diff --git a/googleapiclient/version.py b/googleapiclient/version.py
index 55f64019ea..aff5f84f98 100644
--- a/googleapiclient/version.py
+++ b/googleapiclient/version.py
@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-__version__ = "2.187.0"
+__version__ = "2.188.0"